Meanings
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1
noun
a breeding colony or nesting place of rooks, penguins, seals, or other social animals
Thousands of seabirds returned to the island rookery in spring.
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2
noun
historically, a crowded and dilapidated urban tenement district, often associated with crime
The reformer's report described families living in an overcrowded rookery.
Thesaurus
Etymology
Formed from rook + -ery and recorded from 1725 for a colony or nesting place of rooks. The word broadened to colonies of other social birds and animals. By metaphor, nineteenth-century speakers applied it to densely crowded, disreputable urban housing.